β-Alanine (or beta-alanine) is a naturally occurring beta amino acid, which is an amino acid in which the amino group is at the β-position from the carboxylate group (i.e., two atoms away, see Figure 1). The IUPAC name for β-alanine is 3-aminopropanoic acid. Unlike its counterpart α-alanine, β-alanine has no stereocenter.

There is evidence that β-alanine supplementation can increase exercise performance, but there is concern about lack of information about safety.

Β-Alanine is white crystal powder, and could be dissolved into methanol, but not in diethyl ether and acetone.